Holiday Shipping & Returns Policy

Holiday Returns Policy

Just in time for the holidays, we've extended our normal 30-day return policy. Any order placed between November 25, 2016 and December 25, 2016 will be accepted for return until February 5, 2017. RMA numbers will be given out until 7:30 PM EST on February 3, 2017. The remainder of our return policy remains in place and must be followed. Please review the rest of our return policy

Gift Certificates by Christmas

Physical Gift Certificates: order by 5 PM EST on 12/18

Electronic Gift Certificates: order by 5 PM EST on 12/23

Custom Bama Chip/Tuner and Mounted & Balanced wheel and tire orders must be placed no later than December 14th, 2015 to ship free for Christmas delivery.

*Free Christmas Shipping is free / guaranteed to arrive by Christmas for the lower 48 states only. APO / FPO and Canadian, Guam, Puerto Rico, US Virgin Islands Customers: Unfortunately we are unable to guarantee shipping times to your addresses, so the above deadlines do not apply. Items being shipped via freight also cannot be guaranteed in time for delivery.

Features & Details

Product Resources

Practically Indestructible. The Powerforce Harmonic Damper features a unique bonding process which adheres the elastomer to the inner diameter of the inertia ring and the outer diameter of the hub with a stronger adhesive making the damper practically indestructible. And this damper features a notch in the back of the rim indicating Top Dead Center (TDC).

Application. This Professional Products PowerForce Harmonic Damper is designed for use on the 1996 to 2004 2 valve and 4 valve 4.6L Mustangs.

Technical Note. When used on 4 valve applications the accessories (alternator, A/C, etc) will spin 3% slower than stock. This harmonic damper is not SFI-approved for track use.

Most Helpful Reviews

5/5

powerforce damper

I bought this damper to replace my old aluminum piggyback style underdrive crank pulley after the key slot wore through it give you peace of mind knowing that this pulley is solid and built to last im ...
not afraid to say that this product is better constructed and looks way better than stock can't go wrong with adding it to the list of mods

4 Questions / 4 Answers

does this damper can be used with the sr underdrive pulley 96 - mid 01 gt I have just bought the sr underdrive pulley 96-mid 01 gt and my mechanic says that i need a new damper i dont want to buy the oem this one seems to look that can do the work, but i want to know if this damper fit with my new underdrive pulleys thanks

LuisVt

Your mechanic is full of it; you don't need to replace your crank pulley to use underdrive pulleys. I've seen over a dozen different types of engines with underdrive pulleys on the stock crank pulley and it worked fine.
Now; if your stock crank pulley is in bad shape (as they can get to be after 10+ years), and the rubber is getting brittle or the two halves are beginning to lose their adhesion, which can cause a serious problem down the road, THEN you would want to get a new crank pulley.
There's nothing wrong with not wanting another OEM unit, though it would work perfectly well.
**This damper will work just fine with your other pulleys.**
It's worth noting that if you have a 4 valve engine (you didn't specify what you have, so I don't know), this damper will further underdrive your accessories by another 3%. I didn't see how much the SR pulleys underdrive the accessories, but I'd guess around 10%; that's a pretty standard number.
With the additional underdriving going on, you might notice some charging issues at idle - lights dimming, electronics acting funky; the alternator just isn't spinning fast enough to be able to charge the battery. In addition, the water pump may have a harder time keeping the engine cool at idle. Therefore, you may want to raise the idle up about 200rpm to compensate for it if you have the ability to do so - i.e. tuner, etc.

Can anyone offer advice on how this one compares to the 2001 mustang bullitt damper? I don't want to mix up something since I know the bullitt came under driven and possibly spin something too slow like my water pump. My damper is just at 160k miles and i want to replace it before it starts to go.

Dashix

Hi, This Professional Products Powerforce Harmonic Damper will make accessories spin 3% slower than stock, but since the 2001 Bullitt's alternator pulley and water pump pulley are lager than stock this damper shouldn't cause any problems.

I bought this damper to replace my old aluminum piggyback style underdrive crank pulley after the key slot wore through it give you peace of mind knowing that this pulley is solid and built to last im not afraid to say that this product is better constructed and looks way better than stock can't go wrong with adding it to the list of mods

Professional Products Powerforce Harmonic Damper (96-04 4.6L)

Is this image helpful?

Thanks for your input!

profess-damper-9604

Word on The Street

These guys are great! Customer service is absolutely top notch. Their pricin points are spot on and every month they off some sort of special on multiple parts. Not only that but the staff will educate u on the parts and their customer reveiw option of every part has been a huge help in determining the validity of each part u buy. American Muscle is the perfect example of what a full service parts distributor and custom tuning shop should be. Im just glad they are Mustang exclusive!

Meet Our Team

My mustang is my first car and every time I look at it, I remember how lucky I am. Ever since I saw a grabber blue GT500, I knew I had to have a grabber blue car. I've done a few modifications to the car since I've gotten it, and of course there's many more to come.